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https://github.com/HorlogeSkynet/systemd-hardene.d.git
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HorlogeSkynet
2c9f14fc28
Debian Trixie shipped a proper systemd unit to manage Mumble server, eventually dropping legacy init script. This way Mumble server is directly started as `mumble-server` system user. So we may drop almost all capabilities and more importantly `@privileged` syscalls predefined set.
40 lines
824 B
Plaintext
40 lines
824 B
Plaintext
[Service]
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AmbientCapabilities=
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CapabilityBoundingSet=CAP_NET_BIND_SERVICE
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MemoryDenyWriteExecute=yes
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NoNewPrivileges=yes
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PrivateBPF=yes
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PrivateDevices=yes
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PrivateIPC=yes
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PrivateMounts=yes
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PrivateTmp=yes
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ProtectClock=yes
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ProtectControlGroups=yes
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ProtectHome=yes
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ProtectHostname=yes
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ProtectKernelLogs=yes
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ProtectKernelModules=yes
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ProtectKernelTunables=yes
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ProtectProc=noaccess
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ProcSubset=pid
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ProtectSystem=strict
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ReadWritePaths=-/run/mumble-server -/var/lib/mumble-server -/var/log/mumble-server
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RuntimeDirectory=mumble-server
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RuntimeDirectoryMode=0750
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RemoveIPC=yes
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RestrictAddressFamilies=AF_INET AF_INET6 AF_NETLINK AF_UNIX
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RestrictNamespaces=yes
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RestrictRealtime=yes
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RestrictSUIDSGID=yes
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LockPersonality=yes
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SystemCallArchitectures=native
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SystemCallFilter=@system-service
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SystemCallFilter=~@privileged memfd_create
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